CVE-2022-24509

Remote code execution via EMF pointer dereference

Published Mar 9, 2022 · Updated Jul 8, 2025

Microsoft Office Visio in affected Office 2019, LTSC 2021, and Microsoft 365 Apps allows remote attackers to execute code via a malicious file. The EMF parser processes EMR_COMMENT_EMFPLUS records without validating a user-supplied value before dereferencing it as a pointer. Exploitation requires a user to open the crafted Visio document or visit a malicious page, after which code runs with the current process rights.

CVSS severity7.8
High
EPSS probability2.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Microsoft Office Visio in affected Office 2019, LTSC 2021, and Microsoft 365 Apps allows remote attackers to execute code via a malicious file. The EMF parser processes EMR_COMMENT_EMFPLUS records without validating a user-supplied value before dereferencing it as a pointer. Exploitation requires a user to open the crafted Visio document or visit a malicious page, after which code runs with the current process rights.

The record

CVE
CVE-2022-24509
Published
Mar 9, 2022
Updated
Jul 8, 2025
Vendor
Microsoft
Product
Microsoft Office 2019
Classifications
CWE-000, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=19.0.0 <https://aka.ms/OfficeSecurityReleases

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Office 2019version=19.0.0 <https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft Office LTSC 2021version=16.0.1 <https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft 365 Apps for enterpriseversion=16.0.1 <https://aka.ms/OfficeSecurityReleases

Published CVSS scores

7.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-000Insufficient Information
T1204.002User Execution Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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